I hope we'll see Loki instigating a war between Asgard and Earth that involves Surtur and the fire demons which leads to civil war in Asgard with Thor opposing Odin/Loki. I also hope they involve the Enchantress finally.

I think we could finally get something special out of a Thor movie with this. The stakes will be far higher than the first two Thor movies, there is a clear direction, the villains should be better, and they have a pair of screenwriters who really care about the character and have a vision for the movie. Now I just hope they hit on the right director this time who really likes the character and wants to tell his story.